admin

• 11 Linux Commands I Run on Every Fresh Installation (link)
• Linux Security Cheat Sheet (link)
• Systemd & Journalctl Cheat Sheet (link)

bash

• Shell Scripting for Beginners (link)
• Bash Shell Scripting—DAY 1 (link)

network

• Networking for DevOps (link)

misc

• apt man page (link)
• apt-get man page (link)
• Cheat Sheet (link)
• Standard Aliases (link)
• ubuntuusers - adduser (link)
• ubuntuusers - Paketverwaltung (link)
• ubuntuusers - apt (link)
• ubuntuusers - git (link)
• ubuntuusers - ImageMagick (link)
• ubuntuusers - mtp (link)
• ubuntuusers - pdftk (link)
• Ubuntu Manpage Repository (link)
• Bash Reference Manual (link)
• bash tutorial (link)
• bash for loops (link)
• Examples of small bash Scripts (link)
• Advanced Bash-Scripting Guide (link)
• Boot Repair (link)
• Super Grub2 (link)
• curl (link)
• access Ubuntu from Windows remotely (link)
• How to install Ubuntu 20.04 and dual boot alongside Windows 10 (link)